Explanation:

3D printing or additive manufacturing is a process of making three dimensional solid objects from a digital file. The creation of a 3D printed object is achieved by laying down successive layers of material until the object is created.

3D printing of confectionery has focused primarily on chocolate and hard sugar candy, and printing of of gummy candy. 

In America , 3D printed bionic ear was generated via 3D printing of a cell-seeded hydrogel matrix in the anatomic geometry of a human ear. It has been used in reconstructive surgery to help repair damaged tissue for example in cases of birth defects or traumatic injuries to severe burns or disease.

Industrial 3D printers have opened new paths at each stage of production of motor vehicles; from the functional prototyping phases, design, and tooling production to parts manufacturing, the automotive industry is one of the pioneers in the use and integration of 3D printing in its processes.

3 D printing is used to produce computer parts (such as circuit boards) which are used in data processing.

Therefore all the statements are correct.